Long-Term Contracts (Costs Incurred on Contracts) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Long-term Contracts Costs Incurred On Contracts Details
Costs and estimated earnings incurred on uncompleted contracts	$ 12,087	$ 4,680
Billings on uncompleted contracts	(11,100)	(4,005)
Net of costs and billings on uncompleted contracts	987	675
Included in accompanying consolidated balance sheets under the following captions:
Other current assets	987	680
Billings on uncompleted contracts in excess of related costs	0	(5)
Net of costs and billings on uncompleted contracts	$ 987	$ 675

Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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